与细菌侵袭力无关的致病因素是()
A.外毒素
B.荚膜
C.磷壁酸
D.血浆凝固酶
E.透明质酸酶
参考答案:A
Jumping out of_______________airplane at ten thousand feet is quite _______________ exciting experience.
A./; the
B./; an
C.an; an
D.the; the
下列慢性胰腺炎影像,哪项不正确()
A.胰管呈“枯枝状”
B.胰实质钙化
C.胰腺可局限性增大
D.腹腔内脂肪堆积
E.胰动脉分支小动脉瘤形成